Well-drilling tool



c. E/REED AND s. SORENSEN.

WELL DRILLING TOOL.

APPLICATION FILED IUNE 15,-192I.

1 4%,1 d. Patented Jan. 31,1922,

- downwardly CLARENCE E. REED AND SAM SORENSEN, OF HOUSTON, TEXAS; SAID SORENSEN v ASSIGNOR TO SAID REED.

WELL-DRILLING TOOL.

Application filed June 15,

To ((15 whom it may convent:

Be it known that we, CLARENCE E. linen and S10 Sonaxsrx, citizens of the lnited States, andresidents of Houston, in the county of Harris and State of Texas, have invented certain new and useful Improvements in Nell-Drilling Tools, of which the following is a specification.

our invention is particularly adapted for operating in whatis known as gumbo or sticky shale and similar formations, and the invention consists in the features and combination and arran ement of parts hereinafter described am? particularly pointed out in the claims.

In the drawings:

Figure l is a side elevation of the. 1nvention.

Fig. J is a bottom plan view, and

Fig. 3 is a view of a detail.

In these drawings cutter blades 1 are SllOWl'l consisting of flat members with a cutting edge 2. These blades incline up wardly and rearwardly. They are arranged in a plane substantially at right angles to the gcncral axis of the drill which -is (lo-- signed to operate by rotating about this axis. T he blades are forged in one piece and they radiate from the axial center of the rotary drill. They are supported by arms '3 which are spaced apart and extend outwardly and from shank which-is screw threaded to be connected with the lower section. of the drill stem. The connection between these arms and the cutting blades It may be of various forms, but in the pars tir'ular construction illustrative of my intention, this connection consists of rivets 5 extending through the lower ends of the arm and through the blades. The arms are shoulderedat (ito afford a bearing for the upper edge of the cutting or scraping blade. The arms on their interior are tapered downwardly as shown at 7.

, At the center of the structure there is a post 8 extending down from'the shank 4 in line with the axis of the cutter or drill. This member has a conduit 9 formed therethrough. which forms a continuation of a conduit, 10 in the shank, so that water may he delivered to the interior of the structur for flushing out the material cut or scraped from the wall of the well being drilled or cut. This post 8 at its lower end connects with the central portion of the cutter organ- Specification of Lettersfatent.

Patented Jan. 31, 1922; 1921. "serial No. 477,783.

ization and in the particular structure shown the post is tapered at its.lower end so as to fit into a corresponding socket at the central portion of the cutting blades. The

conduit 9 is extended through the central,

thereoh 'lhecentral post 8 not only serves ATENT 0mm...

blades and below the upper edges as means forconducting the water to the point where the flushing is to take place, but it also serves to resist the upward thrust and support the cutting blades at the center of the head or drill.

In the action of the device,,the blades cut or scrape off the material from the bottom wall of a hole and this material slides upwardly along the inclined faces of the blades and then the blades which space extends from the up per edges ofthe cutting blades to the shank.

passes into the open space above The height of lthe cutting blades is not great so that the cut material has to pass only a short distancebefore it passes into the-space within the structure over the upper edges of the blades. The rotation of the drill will cause the arms 3 to operate on the loosened or cut material and stir the same, thereby securing thorough mixture of the sticky m'aterial with the water which issues from the ports 12 and in this way the materialwill be made ready for easy removal by flotation and tendency of the material to ball up by accumulating on the faces of the blades will be prevented, this being an objeotion to the ordinary fish tail type of drill generally used for cutting material of this character.

The centralpost 8 acts as a support "to prevent collapse of the arms under extreme pressures."

We -claim:

1. A rotary well drilling tool the tool, with an open space above them for the passage inwardly of the cut material and an open frame support for the said blades, at the lower part of which said blades are located, substantially as described.

2. A rotary well drillingtool comprisin a shank, arms depending therefrom and comprising blades disposed about the axial center of between the arms and between the blades in which the rut material will be subjected to the stirring action oi the blades and arms, substantially as described.

3. A rotary well drilling tool comprising a frame, radiating cutting blades at the lower part of said frame, said blades having a space between them and also above them within the frame in which space the cut material will be stirred by said frame and blades, substantially as described.

4. A rotary well drilling tool comprising radiating cutters inclining upwardly and extending inwardl towards the axis of said drill, and an open supporting structure earrying said blades at its lower end, the space between and above the said cutters receiving the cut material to be stirred, substantially as described.

5. A rotary well drilling tool comprising blades connected together at the axis of the tool and radiating therefrom, and a carrying frame comprising a shank and arms radiat-- ing from said shank and connected at their lower ends with the blades, said arms being spaced apart. 1 a

6. A rotary well drilling tool comprising blades radiating from the axis of the tool, a shank, arms spaced apart, extending from theshank and connected with the blades, and a central post extending fromthe shank to the blades, substantially as described.

7., A rotary well drilling tool comprising cutting blades extending from the axial center, a member having a. conduit for water extending to the central portion of the blades and ports extending through the blades to direct water from said conduit to points in between the blades, substantially as de scribed.

8. A rotary well drilling tool comprbanp,

radiating cutter blades disposed in a plane at rightv angles to the axis of the tool, and supporting means for the said blades having spaced apart portions at the lower ends of which the blades are located, substan tially described.

9. A rotary well drilling apparatus comprising cutters disposed in a plane at right angles to the axis of the tool and radiating from said axis, an open frame supporting said blades, and a central post extending down to the said blades .and having a conduit to carry water thereto, substantially as described.

10. A rotarywell drilling tool comprising blades disposed in a plane at right angles to the axis of the tool and radiating from said axis, said blades being formed in one piece, a central post in connection with the said blades. at 'its lower end and having a conduit for conveying water, and arms spaced apart and carrying the blades at their lower ends.

11. In combination in a rotary drilling tool for wells, blades arranged on edge and inclining upwardly and inwardly, arms spaced apart and carrying said blades at their lower ends and a central member having a water conduit extending between the said arms -For flushing the material cut by the blades. A

12. In combination in a well drilling tool, cutting blades arrangedon edge and disposed in .a plane substantially at right angles to the axis of the tool. an open frame carry ing the blades at its lower part and means for supplying flushing water substantially axially of the tool, substantially as described.

lln testimony whereof we afiix our signatures. 

